Cutting tool

Details Cutting tool Cutting tool

B - Operations, Transporting

23

C

B23C 5/04 (2006.01)

Patent

CA 2719726

Problem Providing a cutting tool by which chip packing can be prevented. Solution to Problem The cutting tool includes: a body 2 that rotates about an axis center; a hole portion 3 that is open in a tip end surface 2 of the body 2; a wall portion 4 that is formed of the hole portion 3 and an outer circumferential surface 2b of the body 2; a notch portion 5 that is notched from the tip end surface of the wall portion 4 and is communicated with the hole portion 3; and a blade portion 6 that is formed or held at a portion where the notch portion intersects with the tip end surface of the wall portion 4. Accordingly, a target member is hollowed by a bottom blade 6a. The blade portion 6 includes an inner side surface 6h that passes through an inner end portion 6e of the bottom blade 6a and intersects with a rake surface through a ridge line, and the inner side surface 6h is inclined to depart from a virtual cylindrical side surface, along an axis center 0, having a cylindrical bottom surface of a rotational trajectory passing through the inner end portion of the bottom blade 6a, as the inner side surface is directed towards the direction opposite to the rotational direction of the body 2. The inclination allows the chips to be easily discharged in the direction opposite to the rotational direction of the blade portion 6.

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